Postandbeam

Post-and-beam is a building method in which the structural frame is formed by a grid of vertical posts supported by horizontal beams. The posts carry loads from the roof and floors to the foundation, while the spaces between can be filled with walls, windows, or other infill. The technique differs from full timber framing in its emphasis on a framed skeleton rather than decorative joinery, with connections often made with metal brackets, bolts, or simple pins.

In a typical post-and-beam system, floors are supported by beams spanning between posts, and joists rest on the beams. This arrangement yields large, open interior spaces and can accommodate expansive window openings. Exterior walls may be masonry, timber, or infill panels, depending on climate and design.

Materials used include solid timber or glulam timbers for posts and beams, as well as steel for a modern interpretation. Engineered wood products and steel framing are common variants today, allowing longer spans and varied aesthetics while maintaining the post-and-beam logic.

Historically common in rural North America, post-and-beam structures were used for barns, houses, and public buildings. The approach gained renewed popularity in the late 20th century as an architectural expression that highlights structure and craft, often featuring exposed timbers and high ceilings.

Considerations include cost, seismic and wind design, thermal performance, and maintenance of exposed wood. While the method enables spacious interiors, it requires careful engineering and skilled construction to ensure proper connections and durability.